InstallerExistingInstallationTest.php

<?php

declare (strict_types=1);
namespace Drupal\FunctionalTests\Installer;


/**
 * Tests the installer with an existing Drupal installation.
 *
 * @group Installer
 */
class InstallerExistingInstallationTest extends InstallerTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests that Drupal fails to install when there is an existing installation.
     */
    public function testInstaller() : void {
        // Verify that Drupal can't be immediately reinstalled.
        $this->visitInstaller();
        $this->assertSession()
            ->pageTextContains('Drupal already installed');
        // Verify that Drupal version is not displayed.
        $this->assertSession()
            ->pageTextNotContains(\Drupal::VERSION);
        // Delete settings.php and attempt to reinstall again.
        unlink($this->siteDirectory . '/settings.php');
        $this->visitInstaller();
        $this->setUpLanguage();
        $this->setUpProfile();
        $this->setUpRequirementsProblem();
        $this->setUpSettings();
        $this->assertSession()
            ->pageTextContains('Drupal already installed');
    }

}